opencv version : 2.4link : https://github.com/opencv/opencv/blob/2.4/modules/imgproc/src/filter.cppvoid cv::filter2D( InputArray _src, OutputArray _dst, int ddepth, InputArray _kernel, Point anchor, double delta, int borderType ){ Mat src = _src.getMat(), kernel = _kernel.getMat(); if( ddepth = dft_filter_size ) { Mat temp; if( src.data ..